Patent application number | Description | Published |
20090145104 | COMBINED CYCLE POWER PLANT WITH RESERVES CAPABILITY - A combined cycle (CC) power plant comprises a gas turbine; a steam turbine; a condenser; a heat recovery steam generator (HRSG), the HRSG comprising an attemperator and a high pressure superheater and attemperator, the high pressure superheater and attemperator disposed at a discharge terminal of the high pressure superheater and attemperator and at a discharge terminal of the HRSG reheater; a generator, and a fuel supply. The steam turbine is connected by multiple conduits to the heat recovery steam generator (HRSG) and the steam turbine exhaust is connected to the condenser wherein support multiple ancillary and reserves to load follow, execute regulation, and meet intermediate power generation service needs in an expedited start process. | 06-11-2009 |
20090272118 | Operation of Dual Gas Turbine Fuel System - The present application provides a method of operating a dual gas fuel delivery system comprising selecting a manifold and fuel flow split; setting the stroke of a high-energy gas control valve based on the fuel split; measuring the primary manifold nozzle pressure ratio across a primary manifold nozzle outlet; comparing the primary manifold nozzle pressure ratio against a primary manifold specification limit; adjusting the stroke of a primary low energy gas control valve to maintain the pressure ratio across the primary manifold nozzle outlet within the primary manifold specification limit; measuring the secondary manifold nozzle pressure ratio across a secondary manifold nozzle outlet; comparing the secondary manifold nozzle pressure ratio against a secondary manifold specification limit; and adjusting the stroke of a secondary low energy gas control valve to maintain the pressure ratio across the secondary manifold nozzle outlet within the secondary manifold specification limit. | 11-05-2009 |
20110023974 | Water Injection Manifold Pressure Relief Vent - A water injection system positioned about a combustor of a gas turbine engine. The water injection system may include a water manifold and a pressure relief system in communication with the water manifold. The pressure relief system may include a relief vent positioned on a pressure relief line. | 02-03-2011 |
20110146290 | METHOD OF STARTING A TURBOMACHINE - The present invention has the technical effect of reducing the start-up time associated with starting a powerplant machine. An embodiment of the present invention provides a method of starting a powerplant machine, such as, but not limiting of, a turbomachine. An embodiment of the method of the present invention provides a new philosophy for starting a turbomachine. This new philosophy involves testing the turbomachine systems before the start-up process begins. | 06-23-2011 |
Patent application number | Description | Published |
20080229757 | Methods and systems for output variance and facilitation of maintenance of multiple gas turbine plants - A method of operating a power generation system is provided. The system includes a first gas turbine engine that uses at least one of a primary fuel and a secondary fuel, and at least one second gas turbine engine that operates using at least one of a primary and secondary fuel. The method includes supplying primary fuel to at least one of the first and second engines from a common fuel source coupled to the first and second engines, and selectively operating the first engine between a first operational position and a second operational position. The first engine using only secondary fuel in the first operational position and operates using only primary fuel in the second operational position. The method includes supplying the second engine with primary fuel from the common fuel source without flaring the primary fuel. | 09-25-2008 |
20080271460 | METHODS AND SYSTEMS FOR GAS MOISTURIZATION CONTROL - Methods and systems for a gas moisturizing system are provided. The system includes a plurality of gas sources configured to supply a flow of gas to a plurality of gas loads, a single gas moisturizer coupled in flow communication to the plurality of gas sources and the plurality of gas loads wherein the single gas moisturizer is configured to supply a flow of gas having a predetermined moisture content to the plurality of gas loads, and a control system configured to maintain the predetermined moisture content. | 11-06-2008 |
20100236240 | Systems and Methods for Pre-Warming a Heat Recovery Steam Generator and Associated Steam Lines - Embodiments of the invention can provide systems and methods for pre-warming a heat recovery steam generator and associated steam lines. According to one embodiment, a method for pre-warming a heat recovery steam generator can be provided. The method can include providing heating steam from a steam source. The heating steam is directed from the steam source to a superheater so that at least a portion of the superheater can be warmed. Once exiting the superheater, the heating steam can be further directed from the superheater to at least one bypass line and maintained in the bypass line until the bypass line attains a predefined temperature or pressure. Furthermore, the method can include directing, after the bypass line attains a predefined temperature or pressure, at least a portion of the heating steam from the bypass line to a reheater so that the reheater can be warmed. | 09-23-2010 |
20100257837 | SYSTEMS INVOLVING HYBRID POWER PLANTS - A system comprises, a first heat recovery steam generator (HRSG) having an upstream intake duct portion, a first gas turbine engine connected to a first exhaust duct operative to output exhaust from the first gas turbine engine to the upstream intake duct portion of the first HRSG, and a second gas turbine engine connected to a second exhaust duct operative to output exhaust from the second gas turbine engine to the upstream intake duct portion of the first HRSG. | 10-14-2010 |
20110283706 | SYSTEM AND METHODS FOR PRE-HEATING FUEL IN A POWER PLANT - A method for assembling a fuel supply system for use with a power generation system. The method includes coupling a fuel heater to a fuel source for heating a fuel. A first heating assembly is coupled to the fuel heater for heating a first flow of water channeled to the fuel heater. A heat recovery steam generator assembly is coupled to the fuel heater for channeling a second flow of heated water to the fuel heater. A valve assembly is coupled between the first heating assembly, the heat recovery steam generator assembly, and the fuel heater to enable a flow of heated water from the first heating assembly and the heat recovery steam generator assembly to be selectively channeled to the fuel heater. | 11-24-2011 |
20120240591 | METHOD FOR SHUTTING DOWN A GENERATOR TO PREPARE THE GENERATOR FOR RESTART - A method and apparatus for shutting down a generator to prepare the generator for restart is disclosed. A power down sequence of a gas turbine of the generator is initiated from an operating state. A purge gas is forced into the gas turbine to extinguish a combustion flame in the gas turbine. The purge gas is swept through the gas turbine to displace the fuel from the gas turbine using a coast down airflow through the gas turbine during the power down sequence to prepare the generator for restart. | 09-27-2012 |
20120247113 | SYSTEM AND METHOD FOR AIR EXTRACTION FROM GAS TURBINE ENGINES - The disclosed embodiments relate to a system and method that allows air to be extracted from a plurality of gas turbine engines and fed to a downstream process, even in situations in which one or more of the gas turbine engines are operating in a part load condition. For example, in an embodiment, a method includes monitoring signals representative of a header pressure of a header, or a pressure of extraction air flow from one or more gas turbine engines to the header, or both, and maintaining substantially continuous flows of extraction air from the gas turbine engines to the header. The substantially continuous flows are maintained when the gas turbine engines are under symmetric and asymmetric load conditions. | 10-04-2012 |
20120290104 | SYSTEM AND METHOD FOR OPTIMIZING PLANT OPERATIONS - Embodiments of the present disclosure include systems and a method. In one embodiment, a system is provided. The system includes a risk calculation system configured to calculate a risk based on a static input and a dynamic input, and a decision support system configured to use the risk to derive a decision. The system also includes a plant control system configured to update operations of a plant based on the decision, wherein the decision predicts future plant conditions. | 11-15-2012 |
20150159561 | METHOD OF CONTROLLING PURGE FLOW IN A GAS TURBOMACHINE AND A TURBOMACHINE CONTROL SYSTEM - A method of controlling purge flow in a gas turbomachine system includes detecting a fault condition in the gas turbomachine system, initiating a shutdown of the gas turbomachine system, introducing a purge flow into a gas turbine portion of the gas turbomachine system, categorizing the fault condition as one of a category one fault and a category two fault, and validating the purge flow if the fault condition is a category one fault and invalidating the purge flow if the fault condition is a category two fault. | 06-11-2015 |